SCM435冷镦钢镦头开裂原因分析

Analysis of Cracking on Upsetting Head of Cold Heading Steel SCM435

使用SCM435冷镦钢盘条镦制螺钉过程中部分螺钉头部出现开裂.对开裂试样进行各种理化试验分析,最终确认螺钉头部开裂的主要原因是材料内部近表面区域存在大尺寸夹渣,次要原因是材料表面存在裂纹,两者共同作用最终导致螺钉镦头开裂.

Cracking of the screw heads occurred during processing from cold heading steel wire rod SCM435 to screws.To analyze the cracked sample by a variety of physical and chemical tests,we finally confirm that the main reason for the cracking of the screw heads is that there is a large-size slag in the near surface area of the material.The secondary reason is that there is a crack on the surface of the material,two factors together lead to screw headset cracking.